Transmission-gearing.



B. E. LARSON. TRANSMISSION GEARING. APPLIUATION P ILBD JUNE 26, 190s.

s SHEETS-SHEET 2. Nl

mi WTNESSES Patented Apr. 6, 1909.

E.- E. LARSON..

TRANSMISSION GBABING. APPMVUA'TIGN FILED JUNE '26. 190g.

3 SHEETS-SHEET 3.

EDWARD EMIL LiliiSON, OF THOMPSON, IOWA.

Application ied June 26,

ilo al! whom it Amay conferir: a

llo it known that i', Bowan!) EMIL Larson, a citizen of the `UnitedStates, and a resident ot l`l'ioinpson, in the county of ti/'innebagoand State ot oefa. have invented a new and improved TraininifssionGearing, of which the following is'a t'ull,elear, and' exact de-'planetary fear movement tor traton)ittiiro;

power from the drivin@ Shaft to the driven yhattK one xnen'iber otthdplanetary gear niovenient meshing' with a pinion mountedl rigidlyupona countershatt and thin countershattbeing driven at a variable speedb v aid of mechanirsin propelled directly from the driving shaft, thearrangement being` Suu-l1 that variations in the speed ol1 the counteryaha'lt retard. to a greater or lesserexteiit, the treodom oi theplanetary rear movement, and in this manner control indirectly. the

. peed and power ot1 thn driven Shaft as conipareti with the power andlaperti ot the drivingr .sh-att.

Reference i# to be had to the acrompairv ing .drawings t'ormiirg` n partot this Specitication, in which /aimiiar characters of reitet# enceindicate eorreeptniding parte` in all the figures.

Vitigni-o l a vicw, partly in elevation'and partly in section on the`line i-l of 2, looking; in the direetion ot the arrow, Showing onefoi-in oit-my improved transmission gearing, this view showing thedriving- Shaft, the driven shatt the planetary gear movement, and the'vai-ione friction gear members ior emit-rolling. by aid of n lever, the

Speed of the Counters-inrit; ltigj. 2 is a ver-` tical section upon theline 2---2 oilfig. 1, looking' in the direetion o't the arrow, this viewshowing the change speed mechanism and the i'uanner in which the saineis oontrolled by aid o't a iand lever; Fig. 3 is a Specteationof LetterePatent.

Patented april e, 190e.

1908. senat No. 440,476.

tfragmentary section through the 4friction -wheel for transn'nttinp,`power trom (inept able the driving' Shaft to cause the rotation or' thecountershnt't;4 and Fig. l is an elevation showing .my invention ascontrolled by aid ot' a treadle. l

Mounted upon sills 5, o are beams 7, 8 nupportino` cross bars t), l0.Mounted upon the beam l is a bearingl il Supportinga revoluhle drivingshaft l2. lflncire'ling this ehat ia a ball bearing The driving shafti511 provided with an enlarged porand also with a projeeting portionl2", the diameter of which is substantially the Same. as that ot thedriving` shaft aside troni the enlarged portion ll. Mounted rigidly uponthe enlarged portion lZL is a friction disk it which engages ait'riction wheel 15. Thinl friction wheel, See lfifr. 3, is providedwith oppositely diapos-ed diskelo, ti held together by a bolt land a keylt). it Urarne Ztiaupports the friction wheel i and #ewes a bearing-rfor the name. The let-trame mounted upon a z-alide rod 2i, the latterbeine' Supported by the eros-s barsI it. it) and the Sill (3. .lournaledto one end of' the slide rod is a rocking,` arm 32 which .is actuated byu hand lever (see Fig. i5),

inn` shaft 23 extending through a vbearing- Sleeve 23" which issupported upon the framework. A\ rack 2t is mounted upon .theeill t3 andis engaged by a pawl. 25 carw ri'ed by th hand lever 22). This pawl iscontrolled by ay Sliding rod it() which tenth1 into a handle 2, thelatter being ot 'cylindrical torni and made hollow so as to accommodatea spring` :tor pulling upon. the rod 26 so :is to cause the 'pawl 25 tonormally engagethe racl Qft. The slide rod 2l is encircled by a spiralspring' 2S, the purpose et which to ret-ain the Slidinfr rod 2l,friction wheel 15 and parts immediately connected therewith, in theirrespeetive normal positions except when the springl QS is coaipressed.or in other words, when the hand lever 22E is moved to the let'taeeording' to Fig. i'.' Y

,lt coyntershait shown at 2t) and is jour'- naied in bearings 80.mounted upon the eounterohatt liandT is; 1inovided with a sleeve 32.threaded externally and connected with the counterehatt 29 by aid ot aSpline ther-friction disks to another, in order to ent A; friction diskEl is,

This s] fevefis" litt lhe threaded sleeve 3Q provided with an adjustablenut 8l and a loch nutS. A spiral spring; 3G encircles the threaded stem32 and bears against the adjustable nut Ill. 'lhis spiral spring`also'eucag'es a pinion 3T which is secured firmly upon the countershaftit). this countcrshaft heineh provided with a hall bearing $38.

.kt $9 is a driven shaft which is of tubular form. This driven shaftover the portion l2" of the driving shaft and is revoluble inrelation tothe latter. The driven shaft 2&5) is provided with two trunnions e0.lhivolubly mounted upon the trunnions all is a, bevel `ear ell whichmeshes with a bevel gear vlvZofy the same size, the latter beingr keyedupon the portion 121 of the driving shaft. The bevel Leje-ar 4t2 niesheswith a bevel `ear Llil and the latter meshes with a bevel gear del.rfhis last-mentioned' bevel lgear is provided witha sleeve Llll integralwith it, theI sleeve encircling the shaft 39 and being' revolublerelatively to the same. '.lhe bevel gear del is integral with a spurgear 45 which meshes with'the pinion.37. At casing 4G having asubstantially hemispherical form, is boltedA upon the spur gear l5 andturns with it. The portion 12"L of the shaft l2 extends through thiscasing.

In the form shown in Fig. 4;A the driving shaft is shown at l2 andmounted upon it is.

a driving pulley 11S, and a driven pulley is shown at 4S). A sliding rodis shown at 2l and is quite similar in its action to the sliding rod 21shown in the other views. It is connected by a chain 50 with a treadle51 and drawn downwardly by aid of this treadle. 'A spring` 52 encirclesthe slide rod 2la and is used for retracting` the same. A framework 53supports the parts shown in FiA Otherwise than as stated, theconstruction and action of the parts appearing in this view are the sameas the construction and action of the. parts shown in the other views.

The operation of my .device is as follows: Power being applied to thedriving' shaft, the bevel gear l2 necessarily turns 4with the drivingshaft. The bevel gears 41, 43, bccause they mesh with the bevel gear 42,tend to turn and would turn freely except lfor the fact that they areretarded by the bevel gear 4l. by` the rotation of the spur gear 1-5,and the rotation of this spur gear is dependent largely upon the freedomof movement of the pinion 37 and consequently of the countershaft 29.otherwise entirely free, it would simply rotate in idleness, therebypreventingY 'the power received from the driving shaft from beingtransmitted any farther than the countershaft E29. This countershaft,however, is not free. It can travel only as allowed by the friction disk31, and the latter The latter can turn only as permitted- If theeountershaft 29 were 'is restricted in its rotation becauseof itsconiact'with the friction wheel 15,;the latter in turn being'controllable directlyby the friction dish 14 which turns positively withthe driving` shaft. .is the slide rod 21 or Q1 is moved at will so as toshift the positionof the friction wheel, the speed of the driven shaft,as compared with that of the driving shaft, is varied within widelimits. The form of the device shown in Fig. 1 may be employed inconnection with a motor driven vehicle. In such event, the engine shouldbe supplied with a governor. rlhe engine may then be run constantly at auniform speed, although ,the car may remain Stationary yor may be run atanyv desiredlspeed within the capacity of the machine. x

`lVhen the mechanism shown in Fig. .1 is used in a shop for the purposeof handling power, it may take the place of an immense lot of shaftingand countershafting. I nd that. in the apparatus above described thetendency of the friction wheels to slip is very slight as compared withthe friction Wheels used ordinarily in friction gears.

If the friction wheel 15 be caused to occupy the general positionindicated in Fig. 1 its general plane is approximately in the pitch linebetween 45 and pinioni'. W hen this is the ease the constructiveor'ie'ffective diainetervof the disk 14 in Contact with the 'center ofthe friction wheel 15 bears the same relation to the actual diameter ofthe disk 14 as the diameter of the spur gear 45 has to that of thepinion 37. lf, now, the shaft 12 turned and the shaft 39 meets withresistance, the gearfl (acting throuvlr the mediuuiof the pinion 37)must turn the (.ountershaft Q9 at a speed corresponding to the speedat,- which the friction disk' 14 (acting through the medium of thefriction disk 3l) tends to turn Lthe countershaft 29. if, now, thefriction wheel 15 be moved nearer the center of the friction disk 14 (sovas yto reduce the constructive or eective diameter of the latter) itfollows that the eouutershaft 29 and the spur gear 45 must rotate atslower speeds, and the driven shaft 3) must rotate in the same directionas the driving shaft 12 and with a speed equal to the difference betweenthe speed of the driviupY shaft 12 and that of the spur gear 45 whichrotates in the opposite direction.

As may be understood from the forelgoig, explanation the driving;`shaft. 12' actuates the driven shaft 3S), not through the medium of thefriction disks and frictionthe driving:r shaft 1Q to tlie driven shaft39 is therefore due primarily to the action` of isol pinion 37. and

gear a5, as would be delivered from the.

driving shaft l2 through various parts to the driven shaft 39 underother conditions.

l/Vth the parts built and adjusted for the slovest transmission to thedriven shaft.I about one half as much vpower would be requited toovercome the reaction of the spur gear If the spur gear a5 be given adiameter three tiines as great as that of ,the

pinion 37, and the friction disks 14e and 3l be proportionatelyincreased in size, the work required for the friction Wheel '15 is onlyfrom one-thirteenth to one-ninth What might otherwise be required. Itwill thus be seen that by varying the proportion of various revolubleparts the speed and power may be varied correspondingly Within Widelimits. ',lhe pressure of the friction disk 3l against the frictionWheel 15 isa factor in the control of the driven shaft 39. In order toincrease or diminish the pressure of the friction disk 3l upon thefriction Wheel 15. the nut. 'B4 is turned and after the required tensionof the spring 36is attained, the lock nut 35 secures the nut 34 inposition. The operator by thus adjusting the tension of the spring 3Gymay increase the range of usefulness of the device. Thaball bearingsused are of the ordinary'ball thrustpattern.` l

i do not limit myself to any particular iro ortions for any7 of the)arts shown. nor l to any special materials out. of which the `parts areconstructed.

-Having thus described my invention, l'. claim as new and desire tosecure by Letters Patent:

l. The combiiiation of a drivingl shaft, a bevel gear secured rigidlythereupon. a tubular driven shaft mounted on the driving shaft andprovided with truiinions, bevel gears mounted upon said trunnions andmeshing With said iirst-iiientioned bevel gear, abevel gear meshing withsaid bevel gears mounted upon said trunnions, and having a.

sleeve mounted to turn on the driven shaft,-

a ievoluble member connected with said bevel gear, and meanscontrollable at Will for allowing said revolulole member varying degrecsof freedom.

2. The combination of a driving shaft, a tubular driven shaft mounted onthe drivingsliaft, Gear members connected directly with said drivingsliaftaiid with said driven shaft for ei'iabliiig'power to betransmitted from said driving shaft to said driven shaft.

one of said gear members beii'ig mounted to turn on the' driven shaft. afriction 7o disk mounted upon said driving shaft and 1 actuated thereby,a. friction wheel engaging said friction disk; a second friction diskengaging said friction Wheel, a countershaft for supporting saidlast-mentioned friction disk, a lpinion secured rigidly upon saidcountershaft and ineshiiigoivitli said lgear iiienibei' mounted to turnon the driven shaft, and means controllable at Will'for varying theposition of said-friction wheel relatively to said friction dis is.

3. ln a transmission gearing, the combination of a driving shaft, adriven shaft, gearing connecting said driving shaft With said drivenshaft, friction mechanism connected with said driving shaft and withsaid driven shaft for the purpose of qualifying the action of saidgearing, the said friction mechanism including a friction Wheel, a sliderod carrying said friction Wheel, a spring. for maintaining the sliderod in normal pousitioinaiid means for moving the slide rod to regulatethe action of said friction mechanism.

4. In a transmission gearing, the combination of a driving` shaft, adriven shaft, gear members connected with said driving shaft and withsaid drivensliaft, and friction nieclianisin for qualifying the effectof said gear members, said frictioiiineehanisni including a frictiondisk and a friction Wheel, a. slide rod, a frame mounted on said sliderod and forming a bearing for the friction Wheel, a spring formaintaining the slide rod in nor mal position, and means controllable atwill fo moving said slide rod to shift the position of said frictionWheel relatively to said friction disk.

ln a transmission gearing, the combination with a driving shaft, adriven shaft and gearing connecting said driving shaft With said drivenshaft, of a coiiiitershaft, gearing connecting' the countersliaft withthe. driven shaft, a. friction disk mounted on the countershaft, a'friction disk mounted on the driving shaft, a spring pressed slide rod,a frame mounted upon the slide rod, a friction wheel journaled in saidframe and adapted to engage the said friction disks, means coi'inectedwith the slide rod for moving` the saine against the tension of itsspring to shift the position lof the fric-- tion wheel. relatively tosaid friction disks, andl means foi regulating the pressure of thefriction disk carried by said countershaft upon said friction wheel.

6. The combination of a driving shaft, a bevel gear secured rigidlythereon, a .tubular driven shaft mounted on the driving shaft andprovided' With trunnions, bevel gears mounted upon said Vtrunnions andmeshing lBO u @masa with slxd Hfst mentioned, bevel geur, a bevel gearmeshlng wLh her bevel gem-,s ou said ea-immens und having asleevevmoxinted to', mm1 on' amid gil-*ven shaft, a spul' gear in; namet0 this specification in the pesence of wgfluvl i111 ihe last mentionedbevel gezu, a two Subsm'bng Witnesses.

or regulating the zwam Cif snd-frctnn 1e l l mumersl'm'fl, :x piniontheel/v01). ulleshing with RDW/TARD EMIL LARSO l! mechunifmx.

En estlmony whereof l have slgued my nhl epm' gem',.1ielm1 mechanism;connected Witnessesz Vith shud ill-nung shaft and wllh sind A. Ik..-xnmzsox, voullershaft. und means Conil-mumble at will l R. ALQL'ls'r.

